我有一个简单的问题。为什么在下面的代码中,这部分 - HttpPostedFileBase file
- 为空?当然ArticleModel model
不是空的,只是file
。
我的控制器动作的开始:
public ActionResult Add(ArticleModel model, HttpPostedFileBase file)
...
我的表格:
<section id="">
@using (Html.BeginForm()) {
@Html.AntiForgeryToken()
@Html.ValidationSummary()
@ViewBag.Status
<fieldset>
<legend>Add</legend>
<ol>
<li>
@Html.LabelFor(m => m.title)
@Html.TextBoxFor(m => m.title)
</li>
<li>
@Html.LabelFor(m => m.Categories)
@Html.DropDownListFor(m=> m.categoryID, Model.Categories, "- lorem -", new { @class="dropdownlist" })
</li>
<li>
@Html.LabelFor(m => m.connectedArticlesID)
@Html.TextBoxFor(m => m.connectedArticlesID)
</li>
<li>
<input type="file" name="file" id="file" />
</li>
<li>
@Html.LabelFor(m => m.introduction)
@Html.EditorFor(m => m.introduction)
</li>
<li>
@Html.LabelFor(m => m.content)
@Html.EditorFor(m => m.content)
</li>
</ol>
<input type="submit" value="Add" />
</fieldset>
}
</section>
编辑:
我的模特
public class ArticleModel
{
[Display(Name = "Number")]
public int articleID { get; set; }
[Required]
[Display(Name = "Tilte")]
[StringLength(250, ErrorMessage = "Tytuł musi mieć długość od {0} do {2} znaków.", MinimumLength = 6)]
public string title { get; set; }
[Required]
[Display(Name = "Similar articles")]
public string connectedArticlesID { get; set; }
[Display(Name = "CategoryName")]
public string category { get; set; }
[Required]
[Display(Name = "Category")]
public int categoryID { get; set; }
[Required]
[Display(Name = "Category")]
public IEnumerable<SelectListItem> Categories
{
get
{
return new[]
{
new SelectListItem { Value = "1", Text = "Kategoria pierwsza" },
new SelectListItem { Value = "2", Text = "Kategoria druga" },
new SelectListItem { Value = "3", Text = "Kategoria trzecia" },
};
}
}
[Display(Name = "Content")]
[Required]
[StringLength(6000, ErrorMessage = "Treść musi mieć długość od {1} do {2} znaków.", MinimumLength = 30)]
[UIHint("tinymce_jquery_full"), AllowHtml]
public string content { get; set; }
[Display(Name = "Introduction")]
[Required]
[StringLength(6000, ErrorMessage = "Wstęp musi mieć długość od {1} do {2} znaków.", MinimumLength = 30)]
[DataType(DataType.MultilineText)]
public string introduction { get; set; }
}
答案 0 :(得分:6)
我有一个简单的问题。为什么在下面的代码中,这部分--HttpPostedFileBase文件 - 是空的?
因为您没有在表单上将enctype
设置为multipart/form-data
:
@using (Html.BeginForm(null, null, FormMethod.Post, new { enctype = "multipart/form-data" }))
{
...
}
参考:http://haacked.com/archive/2010/07/16/uploading-files-with-aspnetmvc.aspx
在您将Html.BeginForm
切换为Ajax.BeginForm
然后问问HttpPostedFileBase file - is null
的问题之前,答案是您无法使用AJAX上传文件。您将不得不使用文件上传插件,如Uploadify或Blueimp文件上传。我只是提到这个记录,以避免进一步可能的重复问题。
更新:
根据评论部分的要求,您可以将文件字段添加到视图模型中:
public class ArticleModel
{
[Required]
public HttpPostedFileBase File { get; set; }
...
}
然后让你的控制器操作直接将此视图模型作为参数并删除HttpPostedFileBase参数:
public ActionResult Add(ArticleModel model)
{
if (ModelState.IsValid)
{
... work with model.File directly here
}
}
为了避免域模型和视图模型之间存在任何歧义,我会使用ViewModel为它们添加后缀:
public class ArticleViewModel
{
...
}